Hi,

First you'll need to configure the host's kernel parameters to use huge pages (2M or 1G on x86).

Then in case you want to use huge pages for your high performance VM, set it via Custom Properties to tell oVirt which size of hugepages to use for that VM. Our recommendation is to use the same size as set for the host. Please check [1] for more details on how to configure your VM.

One of our colleagues wrote a blog post that is a bit old but may help: https://mpolednik.github.io/2017/06/26/hugepages-and-ovirt/

[1] https://www.ovirt.org/documentation/vmm-guide/chap-Additional_Configuration.html#configuring-huge-pages

Thanks,
Sharon




On Mon, Dec 16, 2019 at 11:43 PM <suporte@logicworks.pt> wrote:
I see, Thanks

For the huge pages, do I need to configure the kernel or just use the value of 1048576, which is the recommended one?

Thanks 

José

De: "Sharon Gratch" <sgratch@redhat.com>
Para: suporte@logicworks.pt
Cc: "users" <users@ovirt.org>
Enviadas: Domingo, 15 De Dezembro de 2019 13:43:23
Assunto: Re: [ovirt-users] NMA nodes

Hi,

Enable virtual NUMA nodes and setting NUMA pinning topology for a high performance VM are both suggested configuration changes which are proposed to the user. Both are not a mandatory configuration.
Therefore, you can still set a high performance VM even if your host doesn't support NUMA (i.e. only one NUMA node exists). Just ignore those recommendations appear on the High Performance VM popup after saving the VM's configuration.

Regards.
Sharon

On Sun, Dec 15, 2019 at 12:10 AM <suporte@logicworks.pt> wrote:
Hi,

My host only shows one NUMA node. It means that I cannot setup a high performence VM?

Thanks

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